from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, BooleanField, SubmitField
from wtforms.validators import DataRequired, Length, Email, Regexp, EqualTo
from wtforms import ValidationError
from ..models import User

class LoginForm(FlaskForm):
    email = StringField('Email', validators=[DataRequired(), Length(1, 64), Email()])
    password = PasswordField('Passowrd', validators=[DataRequired()])
    remember_me = BooleanField('Keep me Logged in')
    submit = SubmitField('Login In')


class RegistrationForm(FlaskForm):
    email = StringField('Email', validators=[
        DataRequired(),
        Length(1, 64),
        Email()])

    username = StringField('Username', validators=[
        DataRequired(),
        Length(1, 64),
        Regexp('^[A-Za-z][A-Za-z0-9_.]*$', 0, 'Usernames must have only letters, numbers, dots or underscores')])

    password = PasswordField('Password', validators=[
        DataRequired(),
        EqualTo('password2', message='Password must match.')])

    password2 = PasswordField('Confirm password', validators=[DataRequired()])

    submit = SubmitField('Register')

    def validate_email(self, field):
        if User.query.filter_by(email=field.data).first():
            raise ValidationError('Email already registered.')

    def validate_username(self, field):
        if User.query.filter_by(username=field.data).first():
            raise ValidationError('Username already in use.')


class ChangePasswordForm(FlaskForm):
    old_password = PasswordField('Old Password', validators=[
        DataRequired()
    ])
    password = PasswordField('New Password', validators=[
        DataRequired(),
        EqualTo('password2', message='Password must math')
    ])
    password2 = PasswordField('Confirm new Password', validators=[
        DataRequired()
    ])
    submit = SubmitField('Update Password')


class PasswordResetForm(FlaskForm):
    email = StringField('Email', validators=[
        DataRequired(),
        Length(1, 64),
        Email()
    ])
    password = PasswordField('New Password', validators=[
        DataRequired(),
        EqualTo('password2', message='Passwords must match')
    ])
    password2 = PasswordField('Confirm Password', validators=[
        DataRequired()
    ])
    submit = SubmitField('Reset Password')

    def validate_email(self, field):
        if User.query.filter_by(email=field.data).first() is None:
            raise ValidationError('Unknown email address.')

class PasswordResetRequestForm(FlaskForm):
    email = StringField('Email', validators=[
        DataRequired(),
        Length(1, 64),
        Email()])
    submit = SubmitField('Reset Password')


class ChangeEmailForm(FlaskForm):
    email = StringField('New Email', validators=[
        DataRequired(),
        Length(1, 64),
        Email()
    ])
    password = PasswordField('Password', validators=[
        DataRequired()
    ])
    submit = SubmitField('Update Email Address')

    def validate_email(set, field):
        if User.query.filter_by(email = field.data).first():
            raise ValidationError('Email already registered')
